A driver told police he would sleep off alcohol by staying in the back seat of his car, but was stopped at the wheel 90 minutes later.
Police first approached Kazimierz Wondzinksi (51) at 1.50am on December 16 and smelled alcohol on his breath.
Marie Stace, prosecuting, said Wondzinski had argued with his girlfriend “and agreed with the officer he would sleep in his car until the morning before driving off”.
But police then saw his car move off from Winsover Road, Spalding, at 3.20am.
Miss Stace said a test showed he had 129 milligrammes of alcohol in urine – the legal limit is 107mgs.
Solicitor Rachel Stevens, mitigating, said Wondzinski was unable to get back to sleep having been woken by the officer.
She said: “He was extremely cold – it was December 16 as you have heard. He decided to wait a bit longer. He waited another hour-and-a-half, by which time he felt he would have been okay to drive given the amount of alcohol he’d had earlier.”
Miss Stevens said he was only just over the limit and it was “a miscalculation by him”.
Wondzinski (51), of Knight Street, Pinchbeck, admitted driving with excess alcohol when he appeared before magistrates at Boston on Thursday.
He was banned from driving for a year, fined £280 and ordered to pay £85 costs with a £28 victim surcharge.
Magistrates offered him the chance to cut three months off the ban by attending a drink-drive rehabilitation course.